Rename the settings whose names do not say what they control (closes #234)

Applies the setting renames of the naming audit under the SWW_WAF_ and
SWW_RPROXY_ prefixes, with sneak's names for the IP reputation cache
time and the two time limits, which now take milliseconds. The rproxy
log field default_disposition becomes waf_backend_no_answer, and
config.Config and config.FromEnvironment become config.WAF and
config.WAFFromEnvironment. Go fields, test names and prose follow. No
aliases; nothing reads the old names.

Model: opus-5-5

internal/coreruleset/gitea.conf

@@ -394,7 +394,7 @@ SecRule REQUEST_FILENAME "@rx ^/[^/]+/[^/]+/lastcommit/" \
     "id:900633,phase:1,pass,nolog,ctl:ruleRemoveTargetById=932260;ARGS:refSubUrl"
 
 # The requests below name a file or a branch in a body field, which is read only
-# while SWW_WAF_CORE_RULE_SET_BODY_LIMIT is set. Each field skips the rules that
+# while SWW_WAF_CORE_RULE_SET_BODY_INSPECTION_SIZE is set. Each field skips the rules that
 # refused it.
 # Each field below that names a branch skips these rules:
 #   932120: fix-powershell-module